Research suggests that to produce lasting gains in mental-test scores, interventions must be long-lasting and involve children's _____ participation.
A. active
B. flexible
C. wholesome
D. sincere
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The children ______ sand over the floor.
A. scattered
B. distributed
C. divided
D. spilt
Princess Diana always wears a beautiful ______.
A. clothing
B. cloth
C. dress
D. clothes
In China males are given subtle, sometimes ______, preference in education, job selection and promotion.
A. exaggerated
B. obvious
C. distinctive
D. intentional
Compiling a dictionary ______ much time and patience.
A. costs
B. spends
C. takes
D. uses